Tweaks/Fixes

• Updated shader presets (Fixes overly transparent rain and shallow waters) 
• Tweaked savanna colour map (more realstic and less abrupt colour shifts)
• Tweaked acacia leaves
• Tweaked oak leaves
• Tweak bamboo leaves
• Tweake tulip stem textures
• Tweaked allium stem textures
• Tweaked cherry leaves
• Shifted wither skeleton and stray texture paths (fixes bugged textures when fresh animations not present)
• Tweaked beef inventory display

Additions (Polytone support features added)

• Custom swamp atmosphere
• Custom savanna atmosphere
• Custom jungle atmosphere
• Custom badlands atmosphere
• Custom mushroom fields atmosphere
• Custom desert atmosphere
• Custom mangrove swamp atmosphere